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Clydesdales/Athenas (200+ lb / 91+ kg) Looking to lose that spare tire? Ideal weight 200+? Frustrated being a large cyclist in a sport geared for the ultra-light? Learn about the bikes and parts that can take the abuse of a heavier cyclist, how to keep your body going while losing the weight, and get support from others who've been successful.

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Old 12-30-08, 12:06 AM   #1
rdtompki
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The slippery N+1 Slope

Decided to overhaul my 25 year-old Miyata 912 to get the feel of old down tube-shifting steel. New tires, tubes, brake pads, cables, freewheel, chain, bearings. I'm sticking with a 6-speed freewheel although I believe I can upgrade to a narrower 7-speed setup. Should be an interesting comparison to my Giant OCR1. Wheels were mounted with 700Cx23 rubber and I don't recall very many flats during several centuries, but I probably only weighed 190 back then. Only change from a stock 912 was a conversion to a triple chainring. I don't know how these older frames stand up strength-wise, but I recall the bike as being pretty comfortable.
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Old 12-30-08, 06:51 AM   #2
bautieri
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pics?
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Old 12-30-08, 07:01 AM   #3
txvintage
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Your 912 sits at the top of the line for one of the top Japanese bike builders from back in the day. It is a very desirable bike to have in the C&V world.

If your down tube shifters are indexed, I would think twice about switching to a 7 speed freewheel. You can change your range by changing out the 6 speed freewheel to get lower gearing.

If you have friction shifting, going 7 will have no impact. Of course, if you don't mind giving up the indexed option, 7 speed is no big deal either.

I have the other end of the spectrum of the Miyata line, a One Ten. It's still a well built bike, but I'll probably be searching for a new home for it some where down the line.

We do need pics. Gotta love classic steel!
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Old 12-30-08, 10:08 AM   #4
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Pictures after I've completed the overhaul of course. Bike has been sitting around for the better part of 20 years. Shifters are not indexed, but I'll stick with a 6-speed freewheel for now. After I've fixed up my 912 I'll work on my Wife's old 912. I believe one derailleur is bent so I may have to put a new RD on one of the bikes. Not sure about the freewheel manufacturer (yet), but all other equipmetn is Shimano 600. I was going to sell these on Craigslist and did get a lot of responses, but I was on unexpected travel for two weeks and experienced a change of heart.

It's interesting that when I first got on a bike again after almost 20 years the prospect of downtube shifting didn't seem too inviting, but now that I'm comfortable again I'm welcoming the challenge of having to develop that shifting touch. Not going to convert my new ride to friction shifting, however.
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